1 files changed, 377 insertions, 0 deletions
diff --git a/arch/avr32/boards/hammerhead/flash.c b/arch/avr32/boards/hammerhead/flash.c
new file mode 100644
index 0000000..a98c6dd
--- /dev/null
+++ b/arch/avr32/boards/hammerhead/flash.c
@@ -0,0 +1,377 @@
+/*
+ * Hammerhead board-specific flash initialization
+ *
+ * Copyright (C) 2008 Miromico AG
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+#include <linux/usb/isp116x.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+#include <mach/portmux.h>
+#include <mach/at32ap700x.h>
+#include <mach/smc.h>
+
+#include "../../mach-at32ap/clock.h"
+#include "flash.h"
+
+
+#define HAMMERHEAD_USB_PERIPH_GCLK0	0x40000000
+#define HAMMERHEAD_USB_PERIPH_CS2	0x02000000
+#define HAMMERHEAD_USB_PERIPH_EXTINT0	0x02000000
+
+#define HAMMERHEAD_FPGA_PERIPH_MOSI	0x00000002
+#define HAMMERHEAD_FPGA_PERIPH_SCK	0x00000020
+#define HAMMERHEAD_FPGA_PERIPH_EXTINT3	0x10000000
+
+static struct smc_timing flash_timing __initdata = {
+	.ncs_read_setup		= 0,
+	.nrd_setup		= 40,
+	.ncs_write_setup	= 0,
+	.nwe_setup		= 10,
+
+	.ncs_read_pulse		= 80,
+	.nrd_pulse		= 40,
+	.ncs_write_pulse	= 65,
+	.nwe_pulse		= 55,
+
+	.read_cycle		= 120,
+	.write_cycle		= 120,
+};
+
+static struct smc_config flash_config __initdata = {
+	.bus_width		= 2,
+	.nrd_controlled		= 1,
+	.nwe_controlled		= 1,
+	.byte_write		= 1,
+};
+
+static struct mtd_partition flash_parts[] = {
+	{
+		.name		= "u-boot",
+		.offset		= 0x00000000,
+		.size		= 0x00020000,           /* 128 KiB */
+		.mask_flags	= MTD_WRITEABLE,
+	},
+	{
+		.name		= "root",
+		.offset		= 0x00020000,
+		.size		= 0x007d0000,
+	},
+	{
+		.name		= "env",
+		.offset		= 0x007f0000,
+		.size		= 0x00010000,
+		.mask_flags	= MTD_WRITEABLE,
+	},
+};
+
+static struct physmap_flash_data flash_data = {
+	.width		= 2,
+	.nr_parts	= ARRAY_SIZE(flash_parts),
+	.parts		= flash_parts,
+};
+
+static struct resource flash_resource = {
+	.start		= 0x00000000,
+	.end		= 0x007fffff,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device flash_device = {
+	.name		= "physmap-flash",
+	.id		= 0,
+	.resource	= &flash_resource,
+	.num_resources	= 1,
+	.dev		= { .platform_data = &flash_data, },
+};
+
+#ifdef CONFIG_BOARD_HAMMERHEAD_USB
+
+static struct smc_timing isp1160_timing __initdata = {
+	.ncs_read_setup		= 75,
+	.nrd_setup		= 75,
+	.ncs_write_setup	= 75,
+	.nwe_setup		= 75,
+
+
+	/* We use conservative timing settings, as the minimal settings aren't
+	   stable. There may be room for tweaking. */
+	.ncs_read_pulse		= 75,  /* min. 33ns */
+	.nrd_pulse		= 75,  /* min. 33ns */
+	.ncs_write_pulse	= 75,  /* min. 26ns */
+	.nwe_pulse		= 75,  /* min. 26ns */
+
+	.read_cycle		= 225, /* min. 143ns */
+	.write_cycle		= 225, /* min. 136ns */
+};
+
+static struct smc_config isp1160_config __initdata = {
+	.bus_width		= 2,
+	.nrd_controlled		= 1,
+	.nwe_controlled		= 1,
+	.byte_write		= 0,
+};
+
+/*
+ * The platform delay function is only used to enforce the strange
+ * read to write delay. This can not be configured in the SMC. All other
+ * timings are controlled by the SMC (see timings obove)
+ * So in isp116x-hcd.c we should comment out USE_PLATFORM_DELAY
+ */
+void isp116x_delay(struct device *dev, int delay)
+{
+	if (delay > 150)
+		ndelay(delay - 150);
+}
+
+static struct  isp116x_platform_data isp1160_data = {
+	.sel15Kres		= 1,	/* use internal downstream resistors */
+	.oc_enable		= 0,	/* external overcurrent detection */
+	.int_edge_triggered	= 0,	/* interrupt is level triggered */
+	.int_act_high		= 0,	/* interrupt is active low */
+	.delay = isp116x_delay,		/* platform delay function */
+};
+
+static struct resource isp1160_resource[] = {
+	{
+		.start		= 0x08000000,
+		.end		= 0x08000001,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= 0x08000002,
+		.end		= 0x08000003,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= 64,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device isp1160_device = {
+	.name		= "isp116x-hcd",
+	.id		= 0,
+	.resource	= isp1160_resource,
+	.num_resources	= 3,
+	.dev		= {
+		.platform_data = &isp1160_data,
+	},
+};
+#endif
+
+#ifdef CONFIG_BOARD_HAMMERHEAD_USB
+static int __init hammerhead_usbh_init(void)
+{
+	struct clk *gclk;
+	struct clk *osc;
+
+	int ret;
+
+	/* setup smc for usbh */
+	smc_set_timing(&isp1160_config, &isp1160_timing);
+	ret = smc_set_configuration(2, &isp1160_config);
+
+	if (ret < 0) {
+		printk(KERN_ERR
+		       "hammerhead: failed to set ISP1160 USBH timing\n");
+		return ret;
+	}
+
+	/* setup gclk0 to run from osc1 */
+	gclk = clk_get(NULL, "gclk0");
+	if (IS_ERR(gclk))
+		goto err_gclk;
+
+	osc = clk_get(NULL, "osc1");
+	if (IS_ERR(osc))
+		goto err_osc;
+
+	if (clk_set_parent(gclk, osc)) {
+		pr_debug("hammerhead: failed to set osc1 for USBH clock\n");
+		goto err_set_clk;
+	}
+
+	/* set clock to 6MHz */
+	clk_set_rate(gclk, 6000000);
+
+	/* and enable */
+	clk_enable(gclk);
+
+	/* select GCLK0 peripheral function */
+	at32_select_periph(GPIO_PIOA_BASE, HAMMERHEAD_USB_PERIPH_GCLK0,
+			   GPIO_PERIPH_A, 0);
+
+	/* enable CS2 peripheral function */
+	at32_select_periph(GPIO_PIOE_BASE, HAMMERHEAD_USB_PERIPH_CS2,
+			   GPIO_PERIPH_A, 0);
+
+	/* H_WAKEUP must be driven low */
+	at32_select_gpio(GPIO_PIN_PA(8), AT32_GPIOF_OUTPUT);
+
+	/* Select EXTINT0 for PB25 */
+	at32_select_periph(GPIO_PIOB_BASE, HAMMERHEAD_USB_PERIPH_EXTINT0,
+			   GPIO_PERIPH_A, 0);
+
+	/* register usbh device driver */
+	platform_device_register(&isp1160_device);
+
+ err_set_clk:
+	clk_put(osc);
+ err_osc:
+	clk_put(gclk);
+ err_gclk:
+	return ret;
+}
+#endif
+
+#ifdef CONFIG_BOARD_HAMMERHEAD_FPGA
+static struct smc_timing fpga_timing __initdata = {
+	.ncs_read_setup		= 16,
+	.nrd_setup		= 32,
+	.ncs_read_pulse		= 48,
+	.nrd_pulse		= 32,
+	.read_cycle		= 64,
+
+	.ncs_write_setup	= 16,
+	.nwe_setup		= 16,
+	.ncs_write_pulse	= 32,
+	.nwe_pulse		= 32,
+	.write_cycle		= 64,
+};
+
+static struct smc_config fpga_config __initdata = {
+	.bus_width		= 4,
+	.nrd_controlled		= 1,
+	.nwe_controlled		= 1,
+	.byte_write		= 0,
+};
+
+static struct resource hh_fpga0_resource[] = {
+	{
+		.start		= 0xffe00400,
+		.end		= 0xffe00400 + 0x3ff,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= 4,
+		.end		= 4,
+		.flags		= IORESOURCE_IRQ,
+	},
+	{
+		.start		= 0x0c000000,
+		.end		= 0x0c000100,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= 67,
+		.end		= 67,
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static u64 hh_fpga0_dma_mask = DMA_32BIT_MASK;
+static struct platform_device hh_fpga0_device = {
+	.name		= "hh_fpga",
+	.id		= 0,
+	.dev		= {
+		.dma_mask = &hh_fpga0_dma_mask,
+		.coherent_dma_mask = DMA_32BIT_MASK,
+	},
+	.resource	= hh_fpga0_resource,
+	.num_resources	= ARRAY_SIZE(hh_fpga0_resource),
+};
+
+static struct clk hh_fpga0_spi_clk = {
+	.name		= "spi_clk",
+	.dev		= &hh_fpga0_device.dev,
+	.mode		= pba_clk_mode,
+	.get_rate	= pba_clk_get_rate,
+	.index		= 1,
+};
+
+struct platform_device *__init at32_add_device_hh_fpga(void)
+{
+	/* Select peripheral functionallity for SPI SCK and MOSI */
+	at32_select_periph(GPIO_PIOB_BASE, HAMMERHEAD_FPGA_PERIPH_SCK,
+			   GPIO_PERIPH_B, 0);
+	at32_select_periph(GPIO_PIOB_BASE, HAMMERHEAD_FPGA_PERIPH_MOSI,
+			   GPIO_PERIPH_B, 0);
+
+	/* reserve all other needed gpio
+	 * We have on board pull ups, so there is no need
+	 * to enable gpio pull ups */
+	/* INIT_DONE (input) */
+	at32_select_gpio(GPIO_PIN_PB(0), 0);
+
+	/* nSTATUS (input) */
+	at32_select_gpio(GPIO_PIN_PB(2), 0);
+
+	/* nCONFIG (output, low) */
+	at32_select_gpio(GPIO_PIN_PB(3), AT32_GPIOF_OUTPUT);
+
+	/* CONF_DONE (input) */
+	at32_select_gpio(GPIO_PIN_PB(4), 0);
+
+	/* Select EXTINT3 for PB28 (Interrupt from FPGA) */
+	at32_select_periph(GPIO_PIOB_BASE, HAMMERHEAD_FPGA_PERIPH_EXTINT3,
+			   GPIO_PERIPH_A, 0);
+
+	/* Get our parent clock */
+	hh_fpga0_spi_clk.parent = clk_get(NULL, "pba");
+	clk_put(hh_fpga0_spi_clk.parent);
+
+	/* Register clock in at32 clock tree */
+	at32_clk_register(&hh_fpga0_spi_clk);
+
+	platform_device_register(&hh_fpga0_device);
+	return &hh_fpga0_device;
+}
+#endif
+
+/* This needs to be called after the SMC has been initialized */
+static int __init hammerhead_flash_init(void)
+{
+	int ret;
+
+	smc_set_timing(&flash_config, &flash_timing);
+	ret = smc_set_configuration(0, &flash_config);
+
+	if (ret < 0) {
+		printk(KERN_ERR "hammerhead: failed to set NOR flash timing\n");
+		return ret;
+	}
+
+	platform_device_register(&flash_device);
+
+#ifdef CONFIG_BOARD_HAMMERHEAD_USB
+	hammerhead_usbh_init();
+#endif
+
+#ifdef CONFIG_BOARD_HAMMERHEAD_FPGA
+	/* Setup SMC for FPGA interface */
+	smc_set_timing(&fpga_config, &fpga_timing);
+	ret = smc_set_configuration(3, &fpga_config);
+#endif
+
+
+	if (ret < 0) {
+		printk(KERN_ERR "hammerhead: failed to set FPGA timing\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+device_initcall(hammerhead_flash_init);